Changes

Bone marrow is referred to as [[#Red marrow|red]] or [[#Yellow marrow|yellow]]. Red bone marrow is involved with haemostasis while yellow bone marrow is adipose tissue. Bone marrow occupies the cavities in [[Bones and Cartilage - Anatomy & Physiology#Types of Bone|long bones]] and spaces in [[Bones and Cartilage - Anatomy & Physiology#Types of Bone|spongy bones]].

Bone marrow is referred to as [[#Red marrow|red]] or [[#Yellow marrow|yellow]]. Red bone marrow is involved with haemostasis while yellow bone marrow is adipose tissue. Bone marrow occupies the cavities in [[Bones and Cartilage - Anatomy & Physiology#Types of Bone|long bones]] and spaces in [[Bones and Cartilage - Anatomy & Physiology#Types of Bone|spongy bones]].

==Development==

==Development==

<p>Pluripotential haematopoietic stem cells (PPSC) migrate into bones from the embryonic yolk sac and the foetal liver during development, a process called homing. The cells then associated closely with the connective tissues within the bone. The PPSCs continue to constantly divide in the bone marrow with one daughter cell remaining a pluripotential stem cell and the other daughter cells develops into a multipotential haematopoietic stem cells. The multipotential stem cells also constantly divide with some daughter cells remaining stem cells and the other daughter cells developing into blood cells ([[Haematopoiesis - Anatomy & Physiology|Haematopoiesis]]).</p>

<p>Pluripotential haematopoietic stem cells (PPSC) migrate into bones from the embryonic yolk sac and the foetal liver during development, a process called homing. The cells then associate closely with the connective tissues within the bone. The PPSCs continue to constantly divide in the bone marrow with one daughter cell remaining a pluripotential stem cell and the other daughter cells develops into a multipotential haematopoietic stem cells. The multipotential stem cells also constantly divide with some daughter cells remaining stem cells and the other daughter cells developing into blood cells ([[Haematopoiesis - Anatomy & Physiology|Haematopoiesis]]).</p>

==Red marrow==

==Red marrow==